Burkhardt



(No Model.) Y

J. BURKHARDT. AGHINE POB. IMPRESSING ORNAMENYTA'L DESIGNS UPON MBTALLIC'TUBING. No. 461,812.v

4 Sheets-Sheet 1.

W Patented Oct. 27, 1891.

A v/W rd ...fissi (No Model.) l 4 sheets-sheet 2.

J. BURKHARDT. y

MACHINE FOR IMPRESSING ORNAMENTAL DESIGNS UPON METALLIC TUBING.

. Patented Oct; 27, 1891 4 Sheets-Sheet 4.

(No Model.)

JA. BURKHARDT. MACHINE EOE IMPRESSING ORNAMENTAL DESIGNS UPON METALLIC IUBING.

No. 461,812. Patented Oct. 27,1891.

1n: News refus co., morwmnu., wsumcvan, n. c.

UNITED STATES I PATENT OFFICE.

JOHN BURKHARDT, OF NEIV YORK, N. Y., ASSIGNOR TO VILLIAM I-I.

JACKSON 85 OO.,

or SAME rLAcE.

SPECIFICATION forming part of Letters Patent No. 461,812, dated October 27', 1891.

Application filed May 13, 1891.

To all whom t may concern:

Beit known that I, JOHN BURKHARDT, a citizen of the United States, residing at New York, in t-he county of New York and State of New York, have invented certain new and useful Improvements in Machines for Impressing Ornamental Designs or Forms upon Metallic Tubing; and I do hereby declare the following to be afull, clear, and exact descrip- Io tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

Figure l represents a front elevation of the body of the machine and vexhibits the die-plate actuator and die-plate-frame supporter in vertical section. Fig. 2 represents a side elevation of the same. Fig. 3 reprezo sentis an enlarged vertical section of the dieplates in working position and their immediate connections as arranged in the machine. Fig. 4 represents a transverse section of the die-plates and one of the annular grooved disks between which they work and are guided, and exhibits in section the intermediate studs and bolts which serve to form the frame which holds the die-plates. Fig. 5 representsa side View of two of the die- 3o plates detached and the cone and its cylin- 5o tables A3 and legs A2.

tently to the action of the die-plates and in the means of communicating positive motion to automatically operating mechanism at regular intervals to open the die-plates, as hereinafter more fully set forth.

In the accompanying drawings, A denotes the main frame of the machine supported on The crank-shaft B is journaled in said main frame and is provided Serial No. 392,614. (No model.)

with a gear wheel or pulley C. The jointed vadjustable pitman C connects the crankshaft B to the plunger D, and the latter is guided in grooved ways E, secured to the inner sides of frame 'A. The actuator G is the adjustable screw-bolts F.

The die-plates II are arranged to form a circle standing vertically between their grooved guiding-disks I I, which are held in proper relationvto each other by means of the upright studs J and screw-rods H', the distance between the disks I I being just sufficient to allow the die-plates to work freely toward and from the center. The die-plates are formed of uniform size and shape and their outer edges are acted upon as inclined planes by the actuator G. They increase in width from their upper to their lower ends, as represented in Fig. 5. The inner working edges of the die-plates vshown are scalloped to form corresponding impressions upon a tube on which they will act.

A variety of designs may be formed upon tubing by the use of die-plates having different configurations on their working edges, and series of such variously-formed die-plates may from time to time be substituted for each other to produce different designs.

The grooved disks I I, (which have a central opening,) studs J, and screw-rods H form the die-plate frame, seated upon the annular plate K, having a base K resting upon table A2. A portion of the inner lower edges of the several die-plates are formed with outwardly-inclined planes at N, corresponding with the shape of the cone L, which serves to open or spread them apart after each compressive action, which forces them together around the tube. The cone L is attached to the hollow shaft or holder L', and it in turn connects pivotally with lever L2, and the latter extends outwardly near to one of the legs A2 and it is pivoted at a.. Between the pivots a and a of the lever L2 the actuating-rod a2 is pivoted to it and extends upward and is pivoted with the tilting arm a3, and the latter is pivotally secured to the iixed arm a4, 4secured to the table A3. As a part of arm a2 the standard M projects and is provided at its upper end with a tumbler N', pivoted secured to the iiange F of the plunger D by.

ICO

thereto, and this tumbler normally rests against a stop N2, being held -by the spring N2. The roller lll works 011 a pivot that connects it to the rear of the plunger D, and when the plunger D descends roller M tilts the tumbler N in passing it; but the spring N3 returns it to its normal position, and when plunger D rises roller M strikes tumbler N in passing and lifts tilting arm a2, rod a2, and the inner end of lever L2, which is pivoted to the hollowr cone-holder L and forces the annular cone L at its top against the inclined inner edges N of the dieplates and opens the series of die-plates to allow the tube being wrought upon to be fed upwardly, as hereinafter explained. The end of 'lever L2 is formed as a loop, through which hollow coneholder L passes and to which it is pivoted, as before stated.

There is a continuous vertical opening` in the center of the machine, through which a tube to be acted upon by the die-plates will freely pass as it is fed upward by the mechanism which will now be described.

An arm O, secured to the plunger D, projects out in front, having a hole through which rod O freely works. This rod is provided with an adjusting-screw nut O2 and extends down and is pivoted to lever O2, which in turn is pivoted to a fixed arm O4.

`The lever O3 is provided with a spring-pawl S, which engages in the serrations formed in feeding-bar S, the latter being retained in a vertical position by means of the angular guide P, secured to the table at P and shown in longitudinal section in Fig. 7. The angular guide P for the feeding-bar S extends down below the bottom of the machine and is provided with a correspondingly-formed sliding angular bar P2, to which the serrated feeding bar S is attached by the screws P2. The sliding bar P2 is held in its relation to the xed guiding-bar P by clasps Z. The inner end of the fixed arm O4 has a set screw Q, which may be adjusted under the inner end ot' lever O3 to regulate the extent of the ver tical movement of the latter, and thereby determine the extent of each intermittent feed motion. This provision is made to enable the use of feeding-bars with serrations at greater or less distances apart for the purpose of admitting of the substitution of dieplates having longer or shorter undulations or depressions-that is to say, having projections or depressions at greater or less distances apart. Arm O in ascending strikes nut O2 and raises the rod O and its connected feed mechanism. lVhen the pawl S is releasedI from its engagement with the feed-bar S after having elevated it as indicated, the spring-bolt T, attached to fixed arm O4, will catch into one of the serrations of feed-bar S and prevent it from descending. The arm T is bolted to the sliding angular bar P2 and partakes of its motions, and its inner end extends to the center of the opening, through which a tube to be acted upon is passed, and it is mounted willi a split hollow tube-holder T2,secured within the seat T3, fastened to said arm T. The rod U, located within `the split tubeholder T2, isprovided with the eccentric lever U at its lower end and its upper end ter1ninates with an inverted cone U2. The tube to be acted upon may be inserted from either above or below the machine and its lower end will' come down around the upper end of the split tube-holder P2, when by the movement of the eccentric lever U the inverted cone U2 will be forced down into the upper end of the split tube-holder and cause it to spread and impinge against the inner surface of the tube V and hold it while being fed upward.

The annular plate K on which the die-plate frame rests is provided with a contin nous inclined flange X, corresponding on its inner face with the inclined outer surface X of the die-plate actuator G, and when the plunger D descends, causing the actuator G to force the series of die-plates inwardly to form an impression upon a tube, (inserted at their center in the machine to receive its action,) the lower beveled outer face X of the actuator will pass down within the inclined iiauge X and assure accuracy of the operation.

From the foregoing description it will be seen that the inner scalloped or indented edges of the die-plates lil will form a complete ring or circle when forced inwardly to the full extent of their action around a tube, so as to act upon its entire perimeter, occupying` for the time being the opening through their center; also, that sets or series of dieplates having different designs or shapes formed on their working inner edges may be used in the machine, and that the feeding mechanism maybe adjusted to accommodate the use of such die-plates, whether their undulations or projections, as seen at Y Z in Fig. 5, are at greater or less distances apart.

To receive the action of the machine to impress tigures or designs upon metallic tubes, the latter will be inserted through the open` ing in the center of the machine and be supported at the end of the split tube-holder U by means of the inverted cone U2, which is actuated by the eccentric lever U', as above indicated. The vertical movements of the plunger D, carrying arm O, will cause its descent without acting upon the feeding mechanism, because rod O will freely pass through the hole in the end of said arm O; but when the plunger ascends arm O will act upon nut O2 and elevate rod O and it will elevate O3, causing pawl S to engage in the toothed feedbar S and raise it to the extent of the distance from one tooth to the next, and when pawl S is released the spring-bolt T, attached to xed arm O4, that Works in a grooved way, will catch into the toothed bar S and retain it from descending until the next upward movement is produced by the action of the feed mechanism. The angular bar P2, to which the toothed bar S is secured, carries the arm T', which extends inwardly directly IIO under the tube-holder T2 and supports it, and at each upward movement ot' the feeding mechanism just described the tube-holder T2 and The tube V, which it holds, as specified, will necessarily be carried up to the same eX- tent that the toothed bar S' ascends at each operation, and this Will elevate the tube a dist-ance equal to the distance between the indentation Y, formed on the Working edges of the die-plates H, and immediately before each operation of giving one feed action to the tube the plunger D, which carries roller M', will in its ascent cause said roller to act on tumbler N' and move hinged arm a3 upward sufficiently through its connection to force cone L into the inclined opening at the bottom of the die-plates and open them sufficiently to allow the tube to be fed upward, as

explained. The arrangement of the plunger D and its connections is such as not to interfere with the passage of a tube of greater length than the height of the machine up through the continuons passage, which extends centrally through the circle of dieplates.

It should be observed that the angular guide P and the support P2, which travels with the serrated feeding-bar S', to which it is attached, are shown more clearly in horizontal section, Fig. 7.

Having fully described my invention, I claim and desire to secure by Letters Patentl. In a machine for impressing ornamental designs upon metallic tubes, a set or series of tapering die-plates arranged to form a circle supported in vertical position and guided by grooved disks, in combination with a dieplate actuator for closing the die-plates, having its interior formed to correspond with the tapering exterior form of the set of die-plates, and a cone-shaped die-plate opener, as described.

2. In a machine for forming ornamental impressions on the perimeters of tubes, the automatic tube-feeding mechanism, substantiall y comprising the combination of the plunger D, arm O, rod O', pivoted lever O2, springpawl S, arm O4, spring-catch bolt T, serrated feeding-bar S', working in guides, arm T', split tube-holder T2, inverted cone U2, rod U, and eccentric U', as described.

3. In a machine organized as described, the automatic die-plate-opening mechanism substantially comprising the combination of the plunger D, provided with roller h tilting arm a', provided with standard M, furnished with spring-tumbler N', connectingrod d2, pivoted lever L2, supporting-tube L', and cone L, which acts upon the inclined 1nner edges N of die-plates H, as described.

4. In a machine forirnpressing ornamental figures on tubes, a series of scalloped or 1ndented die-plates arranged to form a circle and supported and guided between annular grooved disks, and a die-plate actuator for closing the dies around a tube, in combination with a cone-shaped die-plate opener actuated by the movements of a plunger ot' a press, as specified.

5. In a machine for impressing designs on metallic tubes, the plunger D, in combination with the actuator G, the set of die-plates H, grooved disks I I, anged annular plate K, having a base K', and the table A3, substantially as described.

6. In the machine, substantially as described, the combination of the tool-holding mechanism comprising the split cylindrical tube-holder T2, the rod U, 'cone-shaped spreader U2, and eccentric lever U', asspeciied.

7. In the machine for impressing designs on metallic tubes, the plunger D, arm O, rod O', lever 03,' serrated feeding-bar S', arm T', tube-holder T2, cone-shaped spreader U2, and their intermediate connections for feeding a tube through the machine, in combination with the roller IWI', tilting arm a', connectingrod a2, pivoted lever L2, cone shaped dieplate opener L, and their intermediate connections for opening the die-plates, substantially as specified.

8. In a machine for forming ornamental designs on the perimeters of tubes, the carrying and guiding mechanism for feeding the tube intermittently to the action of the dieplates, comprising the combination of the serrated feed-bar S', the angular sliding bar P2, to which the latter is secured, the lxed angular guide-bar P, secured to the table, and

the guiding-loops Z', attached to the fixed v angular bar P, as described.

In testimony that I claim the invention above set forth I have affixed my signature in presence of two witnesses.

JOHN BURKHARDT.

Witnesses:

H. P. K. PECK, WALTER E. WooDFoRD.

IOO 

